Composite roofing compound



Patented Mar. 17, 1931 UNITE SI res GEORGE ALLEN OSTERDAY, OF HAMILTON,OHIO, ASSIGNOR- OF ONE-HALF TO EDIVARD DOME, OF COLLINSVILLE, OHIOCOMPOSITE ROOFING COMPOUND No Drawing. Application filed April 25,

This invention relates to an improved composite roofing compound to beused as a covering for either old or new roofs, and it has reference tothe character of compound, which is mixed hot for ready application tothe roof, after which it may be rolled to press it tightly into thepores of the roof.

Briefly stated, the purpose of the compound is to provide a moderatepriced roof whose properties permit the production of a productpossessing durability, lightness in weight, in sulation and shelterproperties, and other features not found in similar roofing compounds.The compound is applicable to roofs of Wood, or metal, or to oldcomposite surfaces. The preferred formula for the average pitched roofis as follows Percent PitchM. P. 285 to 300 40 Trinidad lake asphaltcement 40 Ground cork 15 Ground asbestos 5 I also propose the followingvariation in mix, to meet the needs of different pitched roofs which areexposed to the sun. This mixture is as follows Per cent Obviously, theasphalt is employed for its long life, durability, viscosity, strength,and

resistance to the elements.

Pitch is employed in the mixture to harden and preserve the asphalt Corkis employed as a filler and because of its ability to yield andaccommodate contraction and expansion, of the compound.

Asbestos serves as a binder and heat resister.

In applying the compound, it is advisable to first use a priming coat ofmaterial which is preferably composed of of asphalt, mixed with 30%common oil. In applying the compound, it must be put on the roof hot. Itis then smoothed off, with a hot towel, then rolled with a hot rollerwhich presses the mix- 1928. Serial No. 272,865.-

ture tightly in the pores, crevices, and irregularities.

The mixture adheres to metal, cement or wood, and can be put on old ornew roofs without requiring unusual skill.

It will be observed that there are no nails, no trimming or fitting ofgutters and valleys. Consequently, the compound is applied in littletime and with ease. lVhen finished it has a smooth surface and leaves nosand to wash into gutters to clog the flow of water or to rust thegutter.

It is one solid sheet without a seam or a joint in it. Hence, itprevents leaks and re duces fire hazard. It has the desired resistanceto wind and hail, and possesses other advantages which permit it tofulfill the requirements of a compound of this class.

Changes in proportion, and ingredients may be resorted to Within thescope of the adjoined claim.

Having thus described my invention, what I claim as new is A roofingcompound comprising a mixture of pitch 25 to 40%, asphalt 25 to 50%,cork 35 to 410% and asbestos 5 to 10%.

In testimony whereof I affix my signature.

GEORGE ALLEN OSTERDAY.

